Commentaries of the Four Authorized Vaisnava Sampradayas

The question who is it then that worships Lord Krishna is being answered
here. It is the mahatmanas or the great souls who follow the divine nature
and are not subdued by lust and desire and therefore their minds are not
devoted to anything other than the immutable and eternal Supreme Lord
Krishna, understanding that He alone is the cause of all beings and all
creation. The qualities of such great souls is given later in chapter 16
verse one.

Brahma Vaisnava Sampradaya:

Madhvacarya

Madhvacarya's Commentary

Sri Vaisnava Sampradaya:

Ramanuja

Ramanuja's Commentary

But those whose self acquired merits have led them to approach the Supreme
Lord as their sole sanctuary whose chains of sins have been dissolved and
destroyed and who are born of the divine nature are the mahatmanas or of
noble souls. The mahatmanas know Lord Krishna as the infinite source of all
beings and cause of all creation whose lilas or divine pastimes are
transcendental material existence and beyond the scope of mundane
comprehension. The Supreme Lord Krishna incarnates His avatars or immortal
incarnations out of His causeless compassion for all creation to protect
the righteous. Knowing the Supreme Lord as such the great souls with minds
exclusively devoted worship and adore Him inceesantly. Exclusive devotion
of the mind denotes that exultant state of consciousness where one is
imbued with ecstatic waves of love for the Supreme Lord where if without
such a mood and feeling of worshipful devotion not only in the mind and by
the external senses but from the atma as well then life would become
without support and untenable. Such great souls worship the Supreme Lord
with such intense one pointed focus that this worship alone constitutes
their sole aim and complete goal.

Kumara Vaisnava Sampradaya:

Nimbaditya

Kesava Kasmiri's Commentary

Who then are those who are blessed and praiseworthy? Lord Krishna declares
the mahatmanas or great souls whose hearts are not full of trivial, mundane
desires. This is because all their sins have been eradicated by the
multitudes of meritorious deeds performed in thousands of previous
lifetimes and thus their hearts have been cleansed of all dross and
impurities and they possess the divine nature which will be specifically
explained later in verse one of chapter 16. These mahatmanas have naturally
qualified themselves for contemplation and meditation on the ultimate
absolute truth associated with the Supreme Lord. Thus knowing Lord Krishna
as the original source of all beings and primal cause of all creation and
understanding that He descends and incarnates in His eternal spiritual form
to bless, please and protect His devotees; such great beings devoutly
worship Him exclusively with heartfelt love in single focused attention.